There are 39 US Post Offices in Providence County serving a total of 614,948 residents equating to 15,768 residents per post office. It's estimated that approximately 981,526 packages are handled across the 39 county post offices annually. Providence County is a county located in the U.S. state of Rhode Island. As of the 2010 census, the population was 626,667 (59.5% of the state's total population). It is home to the state capital of Providence. Providence County is included in the Providence-Warwick, RI-MA Metropolitan Statistical Area, which is also included in the Boston-Worcester-Providence, MA-RI-NH-CT Combined Statistical Area. In 2010, the center of population of Rhode Island was located in Providence County, in the city of Cranston."